The present invention provides a method for obtaining a compound useful as a raw material for various fluororesins in high yield by a short process by using a starting material which is inexpensive and readily available.
Namely, the present invention is characterized by reacting the following compound (1) with the following compound (2) to produce the following compound (3) having a fluorine content of at least 30 mass %, fluorinating the compound (3) in a liquid phase to produce the following compound (4), followed by a cleavage reaction of E
F
of the compound (4) to obtain a compound (5) and/or a compound (6):
E
1
-R
A
-E
1
(1)
E
2
-R
B
(2)
R
B
-E-R
A
-E-R
B
(3)
R
BF
-E
F
-R
AF
-E
F
-R
BF
(4)
E
F1
-R
AF
-E
F1
(5)
R
BF
-E
F2
(6)
wherein R
A
is a fluorine-containing bivalent organic group which is the same as R
AF
, or a bivalent organic group which will be converted to R
AF
by a fluorination reaction, and R
B
is a monovalent organic group which is the same as R
BF
, or a monovalent organic group which will be converted to R
BF
by a fluorination reaction, R
AF
is a fluorine-containing bivalent organic group which is the same as or different from R
A
, and when different, it is a group having R
A
fluorinated, R
BF
is a fluorine-containing monovalent organic group which is the same as or different from R
B
, and when different, it is a group having R
B
fluorinated, E
1
and E
2
are reactive groups which will react to each other to form a bivalent connecting group (E), E is a bivalent connecting group formed by the reaction of E
1
and E
2
, E
F
is a group which is the same as E, or a group having E fluorinated, provided that at least one selected from R
AF
, R
BF
and E
F
, is a group formed by a fluorination reaction, and each of E
F1
and E
F2
which are independent from each other, is a group formed by cleavage of E
F
.
本发明提供了一种方法,通过使用廉价且易得的起始物质,在短时间内高产率地获得用于各种
氟树脂的原料化合物。即,本发明的特点是将以下化合物(1)与以下化合物(2)反应,以产生具有至少30%质量含
氟量的以下化合物(3),将化合物(3)在液相中
氟化,以产生以下化合物(4),然后对化合物(4)的EF进行裂解反应,以获得化合物(5)和/或化合物(6):E1-RA-E1(1)E2-RB(2)RB-E-RA-E-RB(3)RBF-EF-RAF-EF-RBF(4)EF1-RAF-EF1(5)RBF-EF2(6)其中,RA是与RAF相同的含
氟双价有机基团,或者是通过
氟化反应转化为RAF的双价有机基团,RB是与RBF相同的单价有机基团,或者是通过
氟化反应转化为RBF的单价有机基团,RAF是与RA相同或不同的含
氟双价有机基团,当不同时,它是具有RA
氟化的基团,RBF是与RB相同或不同的含
氟单价有机基团,当不同时,它是具有RB
氟化的基团,E1和E2是将相互反应形成双价连接基团(E)的反应性基团,E是由E1和E2反应形成的双价连接基团,EF是与E相同的基团,或者是具有E
氟化的基团,前提是RAF,RBF和EF中至少选择一个是通过
氟化反应形成的基团,而且彼此独立的EF1和EF2是由EF的裂解形成的基团。